package com.sky.handler;

import com.sky.constant.MessageConstant;
import com.sky.exception.BaseException;
import com.sky.result.Result;
import lombok.extern.slf4j.Slf4j;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.RestControllerAdvice;

import java.sql.SQLIntegrityConstraintViolationException;

/**
 * 全局异常处理器，处理项目中抛出的业务异常
 */
@RestControllerAdvice
@Slf4j
public class GlobalExceptionHandler {

    /**
     * 捕获业务异常
     * @param ex
     * @return
     */
    @ExceptionHandler
    public Result exceptionHandler(BaseException ex){
        log.error("异常信息：{}", ex.getMessage());
        return Result.error(ex.getMessage());
    }

    /**
     * 处理sql异常
     * @param sqlex
     * @return
     */
    @ExceptionHandler
    public Result exceptionHandler(SQLIntegrityConstraintViolationException sqlex) {
        String message = sqlex.getMessage();
//        contains包含什么内容   Duplicate entry重复的键值对
        if (message.contains("Duplicate entry")) {
//             Duplicate entry 'dawd' for key 'idx_username'] with root cause
//            异常内容用分隔空串来做下标的字符串
            String[] split = message.split(" ");
//            获取索引为2的元素   就是账户名
            String username = split[2];
            String msg = username + MessageConstant.ALREADY_EXISTS;
            return Result.error(msg);
           }else {
            return Result.error(MessageConstant.UNKNOWN_ERROR);
        }
    }
}
